Exam (elaborations)
IBHRE RESEARCH METHODOLOGY TEST
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IBHRE RESEARCH METHODOLOGY TEST...
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IBHRE RESEARCH METHODOLOGY TESTTo get the average, find the total number of numbers and divide by that number.
For example, the mean of 1,3,4,5 is 3.25, calculated as (1+3+4+5)/4.
ANSWER the median value when numbers are in order.
For example, median values for 1, 3, 6, 8, and 9 are 6 while 45, 56, and 123 are
56, respectively.
mode - ANSWER the most frequently written value.
Example: Mode = 4 for numbers 2, 4, 5, and 6.
range - ANSWER the largest number and subtract the lesser number
Example: 1, 1, 2, 3, 5, 6; range = 6-1 = 5.
Standard deviation, also known as square root variance, is a measure of how
closely points cluster around the mean. Most medical work requires +/- 2
standard deviations to be statistically significant, as displayed on a histogram.
The null hypothesis predicts that there is no relationship between the two
variables.
Rejecting the null hypothesis indicates that the P value is less than or equal to
the significance level.
P-values range from 0 (complete certainty) to 1.0 (total uncertainty), with a
value of less than 0.01 (1%) being suitable for medical statistics.
The correlation coefficient reflects the strength of the association between
variables. The R value equals the regression coefficient. A tight correlation
(closer to 1.0) is desirable.
A scatter plot depicts the ability of one variable to predict another. The "line of
best fit" or "regression" line is depicted on the graph.
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